To customize the settings click on the the Battery icon in the system tray. You can change the taskbar color to Red, Green, Yellow & Auto. If you change the color to Auto then it will change the color according to the remaining battery percentage:
100% - 50% = Green
49% - 11% = Yellow
10% - 0% = Red

You can also change the taskbar text to None, Remaining %, Remaining Time + % & Power Status: